I agree that the browser's built-in bookmarks manager is underrated. I never really got the social bookmarking phenomenon.
For your use case, however, I recommend also getting into Hypothesis. I always used browser-based bookmarks (and still do), but I've gotten a ton of utility out of Hypothesis since I began using it. It's weird, because I came at it slowly, having known about Hypothesis for a long time—my initial impression being, "yeah, okay, kind of neat or whatever", followed by not touching it for years.
The problem with browser-based bookmarks is that you're limited to the title* and URL for recall, plus your own tags. With Hypothesis, however, you can quote from the page in question, marking up specific passages, and then also add your own comments about it (plus tags). This is in fact really the only way that I use Hypothesis—when I feel like scribbling something in the margins. This, however, in a way ends up emerging as a replacement for much of my bookmarks-for-recall use, too, even though it's never really the point. Because the storage model includes the contents of the quoted passage and the text of your own annotation, this additionally grants you, in a limited way, the ability to do partial text search across the contents of the collected pages. As a result, I end up using Hypothesis far more often to relocate something than I do with the bookmarks manager nowadays.
It would be great if this functionality became standard for all browsers (and it might still; folks on the Chrome team have suggested they're serious about adding annotations to the browser in some form). With Mozilla deciding that selling premium plans to a commercial, closed-source SaaS is in their financial interest, however, it seems virtually guaranteed that Firefox's built-in bookmarks will remain deliberately limited for the lifetime of Firefox as a product, in order to funnel people towards Pocket, unless/until Chrome does something to make them feel pressured to change.
* NB: you can technically override the name, I guess, but I've never done that and always let it default to the title. Firefox used to have an additional description/comment field, but this got removed from the UI. I suspect it was rarely used. I can't say I did anything with it more than a handful of times. Hypothesis's UI for actually resolving (i.e. highlighting) the fuzzy anchors really does alter my behavior a lot towards this direction.